Method for ionization of polymers
AssigneeThe Medical College of Wisconsin, Inc.
InventorCharles E. Brown
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Abstract
A method for the ionization of polymers which comprises forming a thick layer of the polymer on a probe tip and then ionizing the polymer in a vacuum with laser irradiation. In a preferred embodiment, a moiety that readily photoionizes in an IR field is incorporated into the thick layer of polymer and the irradiation of the thus modified polymer is done with a CO.sub.2 IR laser. A method is also disclosed for the fabrication of polymer coatings which comprises accelerating the charged polymer ions generated by the ionization of a thick layer of polymer in a vacuum toward the substrate which has an appropriate charge gradient.
Claims6
A method of volatilizing, ionizing and depositing a coating of intact and uncontaminated intractable polymer on a target substrate without fragmentation which method comprises forming a layer of the polymer over about 0.03 mm thick on the tip of a probe, placing the probe tip with the layer of polymer and a target substrate in a vacuum chamber, maintaining charge gradient between polymer and the target substrate effective to attact the ionized polymer molecules to the substrate, and then subjecting said polymer to pulsed, high power IR-laser radiation to cause facile ionization of the polymer molecules which because of the charge gradient are deposited as a coating on the target substrate.
Dependencies are inferred from the claim text.